Method for authorization pairing

An authorization pairing method for an electronic derailleur system on a bicycle, with the electronic derailleur system comprising a plurality of communication devices and an authorization device, the method comprising:

• broadcasting an authorization signal by the authorization device;
• performing a first scanning process by a first communication device of the plurality of communication devices to determine whether the authorization signal is obtained;
• performing a second scanning process by a second communication device of the plurality of communication devices to determine whether the authorization signal is obtained;
• performing the first scanning process by the first communication device continuously after the first communication device obtains the authorization signal for determining whether an identification code is obtained;
• sending the identification code by the second communication device after the second communication device obtains the authorization signal, wherein the identification code represents the second communication device;
• and
• storing the identification code by the first communication device after the first communication device obtains the identification code, to complete an authorization pairing with the second communication device.